Ubuntu Web Sources Lens is a Unity Launcher plugin that will allow users to quickly search for things on the web without opening a web browser. The results are web sources instead of web pages, which are much more understandable.

To install the Unity Web Sources Lens plugin in your Ubuntu operating system, open a terminal window (hit the CTRL+ALT+T key combination) and paste the following commands (one by one, hitting Enter after each one):

sudo add-apt-repository ppa:cscarney/unity-web-place

sudo apt-get update && sudo apt-get install unity-place-websearch

You'll have to restart your session after the installation. Be aware that it is available ONLY for Ubuntu 11.04 (Natty Narwhal).